In the series

In episode 4, Shuu meets up with Wanda who got crashed into a heap of rubbish by Bug-Railmin. Later, Shuu and Wanda were dragged on the runaway train by Bug-Railmin until they were rescued by Yuto and Zuzumin.

In episode 5, Shuu and his parents bring Yuto and Mirai to the riverside were they can have a barbeque there.

In episode 16, Shuu was worried that the twins Ryuta and Michiko might make fun of him for loosing in the marathon race. Later, he was effected by Bug-Banemin's Bugwaza ability which makes him jump like a grasshopper. In the end, Shuu finally finishes the marathon and he wasn't laughed at.